Peter j



P, i HAMLER.

FEHULZEH URIER.

APPULAUON msn MAY 2B. uns??YYY Y mmm Nov. 11,1919.

Tram/E 1.

PETER J. HAMLEB, F CHICAGO, ILLINOIS.

Specicatian of Letter: Patent.

l Patented Nov. 11, 191,9.

Application tiled May 28, 1919. Serial No. 300,853.

' citizenv of the -United States, residing at time, suchA driers -embo Chicago, in the county of Cook and State of Illinois, have invented a new and useful Fertilizer-Briar, of which the following is a s'lpecllcation. his invention relates to certain improvements inmachinesor apparatuses used for drying fertilizer in preparation for its commercial use.

As commonly constructed at the present dy an inner and an outer inclosing drum or cylinder of steel, these two drumsor cylinders being perfectly plain, spaced apart to form a steamspace, whereby the inner drum is heated, provided with suitable feed and dischargeo mugs, and an axially positioned agitator- Y, 4 certain exten? tended,

s aft carrying radiating agitator-arms.

While the drier thus described is, to a practical for the purpose inet t ere are many serious objec. tions. orne of such objections are its expensive construction, owing to the fact that 1t necessarily includes hundreds of staybolts and rivets; thenecessity of employing comparatively heaviy gage, metal in order to provide a reasona le foundation for the stay-bolts; the fact that saidstay-bolts and rivets become loosened by the contraction and expansion of the metal, thereby causing the drums or cylinders to-leak; an finally, by reason of the heads of the stay-bolts being located at the inner side of the inner drum or cylinder, such form obstructions upon which the material being operated upon finds ready lodgment and furthermore necessitates an undue and an undesirable shortening' of theagitator-arms in order that'they may escape or clear the heads of the rivetsand stay-bolts, thus permitting of this lodgment ofmaterial being still further augmented to the extent of forming an insulation around the interior surface of the drum, greatly to the detriment of its heating ability, whereby the eilciency of the apparatus becomes reduced.

The principal objects of my iny'cntion are, therefore, lto overcome the objections stated,

Iheatin 'provi e v`for the expansion and contraction by reducing lvery materially the cost .of manufacture by reason of an entire omission of the now commonly employed hundredsof .stay-bolts and rivets; to provide a smooth inner surface for the inner drum or cylinder, thus permitting the agitator-anus to travel close thereto and prevent the accumulation or deposit of material upon said surface,- thereby increasing thefheating of the apparatus; toprovide -surface for the inner cylinder; to of the metal' and finally, bythe omission of said stay-bolts and :rivets tc permit of the use of 1i hter` metal in theoolb struction of e cyhn ers. 7

d the invention consists in certain feei tunes of construction hereinafter referred to and more particularly pointed outjin the claims.

Referring to the drawing, inV which I have illustrated my inventionm side elevation and partial sectionfl designates the outer drum or cylinder, within which is'inclosed the inner rum or cylinder 2, the latter being of less diameter-'than the outer ldrum andombining therewith to form an intermediate annular steamspace 3. Steamunder pressure-is admitted tothe steam-space by means of inlet-pipes 4 located ne'ar the opposite ends of the apparatus and leading from any suitable source of steam-supply. At'opposite sides the apparatus is provided with exhaust-pipes 5, which may return to the steam-supply or elsewhere. f

Spacingi-rins 6, may be located at the opposite en s o the apparatus between the two drums or cylinders, rivets 7, bein employed to connect the drums or cylinders and the rings. v

The outer drum is a plain cylinder, as heretofore but the inner drum or cylinder is annulnrly corrugated, preferably as shown, though other forms of corrugations capable of performing the functions and rendering the advantages I attain thereby may be substituted. As will be obvious, by thus corrugating the inner drumor cylinder, the same is rendered stronger and better ca able of withstanding the stearnfprcssure; e so it 1,391,628 A l B inne Y Vlimiet Yand positioned in close pmx- Vr'misy't erewth. v'

a, machine of th combination with 'Y mit e cussrrdescribed, the Guterqrspad ir?iiilaic'rlegr'srY,Y gne one end of the machine, u pia connecting the lower en of the same wit the opening '1n the'head, a foram'mous diaphragm suh- 16 dividing the chamber and an exhaust pipe leading rom the chamber above the dla.

' SHETER .1. HAMLER. 

